Running aviator example makes OS unhappy :(

[shmutalov]

Running aviator demo from three-rs examples in background makes OS unresponsible.

Steps to reproduce:

• Build latest three-rs from master branch with cargo b command
• Run aviator example with cargo run --example=aviator command
• Do not minimize aviator window, just change to another window and make aviator run in background
• Wait 1-2 minutes
• ???
• PROFIT!!1

My params:

• Windows 10 x64 (10.0.10240)
• cargo 0.19.0-nightly (fa7584c14 2017-04-26)
• rustc 1.19.0-nightly (2d4ed8e0c 2017-05-03)
• As "parallel" application window I used latest Firefox Nightly (56.0a) browser

I will upload video later...

[kvark]

Thanks for the report! We can block until the window is in focus again.

[shmutalov]

Video of reproducing the issue: https://www.youtube.com/watch?v=NKWJZiVcU1w&feature=youtu.be

[alteous]

What might be the cause of the issue?

[bestouff]

I don't know if it's related, but under Linux (Debian) trying to take a screenshot of the 'aviator' demo killed the X server once.